Confetti and streamers cascade from San Francisco City Hall after Tony Bennett concluded the festivities by singing "I Left My Heart in San Francisco." Mayor Ed Lee and several Giants players, executives and announcers spoke at the ceremony.

Photo: Carlos Avila Gonzalez, The Chronicle

Confetti and streamers cascade from San Francisco City Hall after...

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San Francisco Giants' Pablo Sandoval the MVP of the World Series celebrate their World Championship with a parade up Market Street in downtown San Francisco, Calif., on Wednesday Oct. 31, 2012.

Photo: Michael Macor, The Chronicle

San Francisco Giants' Pablo Sandoval the MVP of the World Series...

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Miguel Gonzalez painted his beard orange for the Giants World Series Championship parade.

Photo: Jason Henry, Special To The Chronicle

Miguel Gonzalez painted his beard orange for the Giants World...

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Giants manager Bruce Bochy hoists the World Series trophy as he rides down Market Street.

Photo: Brant Ward, The Chronicle

Giants manager Bruce Bochy hoists the World Series trophy as he...

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Giants star catcher Buster Posey and his wife, Kristen, pass through a stream of confetti as they ride toward City Hall during the victory parade.

Photo: Michael Macor, The Chronicle

Giants star catcher Buster Posey and his wife, Kristen, pass...

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Buildings along the street were filled with fans as the San Francisco Giants celebrated their World Series Championship with a parade up Market Street in downtown San Francisco, Calif., on Wednesday Oct. 31, 2012.

Photo: Michael Macor, The Chronicle

Buildings along the street were filled with fans as the San...

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Above: Fans in buildings along Market Street get a great view of the parade. Right: Sylvia Jackson of San Francisco painted her face to look like a baseball and donned balloons to ride a Segway during the parade.

Photo: Sarah Rice, Special To The Chronicle

Above: Fans in buildings along Market Street get a great view of...

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In a city that generally makes pretty good use of the colors orange and black on Halloween anyway, this event took it to another level, with confetti and streamers celebrating the Giants' colors cascading down from City Hall and the Civic Center.

Photo: Carlos Avila Gonzalez, The Chronicle

In a city that generally makes pretty good use of the colors orange...

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Giants manager Bruce Bochy took the time to connect with some fans before the start of the parade Wednesday. He had a slow ride in the parade when his car ran out of gas.

Photo: Beck Diefenbach, Special To The Chronicle

Giants manager Bruce Bochy took the time to connect with some fans...

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On a day when a million people took the time to say "hats off" to the Giants, 10-year-old fan Ryan Eyee decided one hat wasn't enough, wearing this papier-mache hat to the parade.

Photo: Jason Henry, Special To The Chronicle

On a day when a million people took the time to say "hats off" to...

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Just as the right-field wall at AT&T Park has open space available for fans, some parade-watchers came up with their own version of the "knothole gang."

Photo: Brant Ward, The Chronicle

Just as the right-field wall at AT&T Park has open space...

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Sergio Romo and a San Francisco police officer in happier times, at the Giants’ World Series victory parade in 2012.

Photo: Sarah Rice / Sarah Rice / Special To The Chronicle

Sergio Romo and a San Francisco police officer in happier times, at...

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Vince Ferrer (in orange shirt) and friends get creative in their efforts to catch a glimpse of the stage in front of City Hall during the Giants' ceremony.

Almost everyone from the team, fresh off a World Series sweep of the Tigers, joined in the celebration, which drew a crowd estimated at more than 1 million people, heading from the Embarcadero up Market Street and wrapping up in front of City Hall.

Befitting the challenges of the 2012 season, the generally smooth parade had a slight bump: The Rolls-Royce carrying manager Bruce Bochy ran out of gas and had to be pushed.

A little Halloween rain even showed up - but not until well after Tony Bennett had wrapped up the celebration by singing "I Left My Heart in San Francisco."

Mayor Ed Lee started the City Hall ceremonies by presenting the team with a key to the city and a golden broom to memorialize the sweep of the Tigers.